xián yí rén qǐ tú cóng hòu mén liū zǒu bèi dūn shǒu de jǐng chá dǔ le gè zhèng zháo

嫌疑人企图从后门溜走，被蹲守的警察堵了个正着。

The suspect tried to slip out the back door but was caught red-handed by the police lying in wait.